package org.duiduo.config.security;

import org.duiduo.api.constant.ConfigConsts;
import org.duiduo.config.security.compoment.JwtAuthencationTokenFilter;
import org.duiduo.config.security.compoment.RestAuthorizationEntryPoint;
import org.duiduo.config.security.compoment.RestfulAccessDeniedHandler;
import org.duiduo.pojo.Role;
import org.duiduo.service.IRoleService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.security.config.annotation.authentication.builders.AuthenticationManagerBuilder;
import org.springframework.security.config.annotation.web.builders.HttpSecurity;
import org.springframework.security.config.annotation.web.builders.WebSecurity;
import org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter;
import org.springframework.security.config.http.SessionCreationPolicy;
import org.springframework.security.core.userdetails.UserDetailsService;
import org.springframework.security.core.userdetails.UsernameNotFoundException;
import org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder;
import org.springframework.security.crypto.password.PasswordEncoder;
import org.springframework.security.web.authentication.UsernamePasswordAuthenticationFilter;

/**
 * Security配置类
 *
 * @author liangze
 */
@Configuration
public class SecurityConfig extends WebSecurityConfigurerAdapter {

    @Autowired
    private IRoleService roleService;

    @Autowired
    private RestAuthorizationEntryPoint restAuthorizationEntryPoint;

    @Autowired
    private RestfulAccessDeniedHandler restfulAccessDeniedHandler;

    @Override
    public void configure(WebSecurity web) throws Exception {
        web.ignoring().antMatchers(ConfigConsts.URL_WHITELIST);
    }

    @Override
    protected void configure(AuthenticationManagerBuilder auth) throws Exception {
        auth.userDetailsService(userDetailsService()).passwordEncoder(passwordEncoder());
    }

    @Override
    protected void configure(HttpSecurity http) throws Exception {
        // 使用JWT，不需要csrf
        http.csrf()
                .disable()
                // 基于token，不需要session
                .sessionManagement()
                .sessionCreationPolicy(SessionCreationPolicy.STATELESS)
                .and()
                .authorizeRequests()
                /*// 允许登录
                .antMatchers("/login", "/logout")
                .permitAll()*/
                // 除了上面，所有请求都需要认证
                .anyRequest()
                .authenticated()
                // 动态权限配置
                /*.withObjectPostProcessor(new ObjectPostProcessor<FilterSecurityInterceptor>() {
                    @Override
                    public <O extends FilterSecurityInterceptor> O postProcess(O o) {
                        o.setAccessDecisionManager(customUrlDecisionManager);
                        o.setSecurityMetadataSource(customFilter);
                        return o;
                    }
                })*/
                .and()
                // 禁用缓存
                .headers()
                .cacheControl();

        // 添加jwt 登录授权过滤器
        http.addFilterBefore(jwtAuthencationTokenFilter(), UsernamePasswordAuthenticationFilter.class);

        // 添加自定义未授权和未登录结果返回
        http.exceptionHandling()
                .accessDeniedHandler(restfulAccessDeniedHandler)
                .authenticationEntryPoint(restAuthorizationEntryPoint);
    }

    @Override
    @Bean
    public UserDetailsService userDetailsService() {
        return username -> {
            Role role = roleService.getRoleByUsername(username);
            if (null != role) {
                return role;
            }
            throw new UsernameNotFoundException("用户名或密码不正确");
        };
    }

    @Bean
    public PasswordEncoder passwordEncoder() {
        return new BCryptPasswordEncoder();
    }

    @Bean
    public JwtAuthencationTokenFilter jwtAuthencationTokenFilter() {
        return new JwtAuthencationTokenFilter();
    }

}
